Supported by Bosky Trees

UKTC Archive

tree-care.info for tree advice

RE: Trees and vegetation near electricity lines

Subject: RE: Trees and vegetation near electricity lines
From: TGregory
Date: Feb 24 2012 13:11:40
______________________________________________________________________
      SPRING 2012 TRAINING FROM QUANTIFIED TREE RISK ASSESSMENT LTD.
   QTRA Licensed User Training - 28 Feb Warwickshire, 13 March Surrey,
           17 April Chorley, 24 April Exeter, 1 May Cambridge.
QTRA Licensed User Update Training - 15 March Surrey, 19 April Chorley.
          A Practitioner's Guide to Visual Tree Risk Assessment     
         29 Feb Warwickshire, 14 March Surrey, 18 April Chorley,
                     25 April Exeter, 2 May Cambridge.
______________________________________________________________________

Thanks for this Gents,

Regarding the additional clearance over the minimum statutory clearance
(x years growth for example), at what point would Tree Officers consider
work not to be exempt and therefore require an application for tree
works. I'm refering now to trees which are protected either by a TPO or
located within a conservation area.

See Mynors 23.7.2
        'In relation to trees on the operations land of a statutory land
of a statutory  undertaker, the 1969 Model Order provides that consent
is not required for the         cutting down, etc., of a protected tree:
where the cutting down, topping or      lopping is for the purpose of
securing safety in the operation of the         undertaking.'

By maintaining the minimal statutory clearances, would that be
considered to be what is allowed under this exemption? Or could they
maintain that minimum statutory clearance plus 3 years growth for
example? Or does that given them the freedom to do more or less what
ever they like?

Thanks again in advance,

Thomas Gregory
Tree Officer


-----Original Message-----
From: WILLIAMS, Tim [mailto:Tim.Williams@xxxxxxxxxxxxxxxxxxxxxxx.gov.uk] 
Sent: 24 February 2012 12:37
To: UK Tree Care
Subject: RE: Trees and vegetation near electricity lines 

______________________________________________________________________
      SPRING 2012 TRAINING FROM QUANTIFIED TREE RISK ASSESSMENT LTD.
   QTRA Licensed User Training - 28 Feb Warwickshire, 13 March Surrey,
           17 April Chorley, 24 April Exeter, 1 May Cambridge.
QTRA Licensed User Update Training - 15 March Surrey, 19 April Chorley.
          A Practitioner's Guide to Visual Tree Risk Assessment     
         29 Feb Warwickshire, 14 March Surrey, 18 April Chorley,
                     25 April Exeter, 2 May Cambridge.
______________________________________________________________________

Electricity companies work to a number of different measurement based on
voltage.

1) Live zone

2)Vicinity zone



The live zone is the effective distance the electricity can arc around
the line or apparatus. This distance is based on voltage and is as
follows:-



*         Not exceeding 33kV  = 0.8m

*         Not exceeding 66kV = 1m

*         Not exceeding 132kV = 1.4m

*         Not exceeding 275kV = 2.4m

*         Not exceeding 400kV = 3.1

The Vicinity zone is the minimum statutory clearance the electricity
company must get for safety purposes and is as follows:



*         Not exceeding 1kV = 1m

*         Not exceeding 11kV = 2m

*         Not exceeding 33kV = 2.5m

*         Not exceeding 66kV = 3m

*         Not exceeding 132kV = 3.5m

*         Not exceeding 275kV = 4m

*         Not exceeding 400kV = 5m

However these are the minimum clearances required for safety. The
operators also have a duty under the electricity continuity of supply
regulations to ensure supply is maintained. To comply with this and to
avoid frequent recuts (and associated cost)  they usually try and gain
consent for the minimum clearance plus an arbitary amount to account for
regrowth characteristics and speed based on species.



Thanks and Regards

Tim Williams

Senior Tree Officer, Specialist Environmental Services

Cheshire West and Chester Council

Tel: 01244 9(72626)

Email: tim.williams@xxxxxxxxxxxxxxxxxxxxxxx.gov.uk

Location: The Forum, Northgate Street, Chester CH12HS

Visit: cheshirewestandchester.gov.uk



-----Original Message-----
From: Johnston, Paul [mailto:PJohnston@xxxxxxxx.Gov.UK]
Sent: 24 February 2012 12:06
To: UK Tree Care
Subject: RE: Trees and vegetation near electricity lines



______________________________________________________________________

      SPRING 2012 TRAINING FROM QUANTIFIED TREE RISK ASSESSMENT LTD.

   QTRA Licensed User Training - 28 Feb Warwickshire, 13 March Surrey,

           17 April Chorley, 24 April Exeter, 1 May Cambridge.

QTRA Licensed User Update Training - 15 March Surrey, 19 April Chorley.

          A Practitioner's Guide to Visual Tree Risk Assessment

         29 Feb Warwickshire, 14 March Surrey, 18 April Chorley,

                     25 April Exeter, 2 May Cambridge.

______________________________________________________________________



Hi Thomas,



As I recall they were amended (increased distances + several years
re-growth) a few years back as we experienced trees that had never been
in the firing line before requiring cutting within the wayleave.



From memory it was to do with making less frequent return visits as much
to do with H&S (don't have a reference though I'm afraid).



Try the National Grid - they are working under the large HT towers that
run through our Borough at the moment.



PJ.



Paul Johnston

Principal Tree Officer

Planning & Environment

Fareham Borough Council

www.fareham.gov.uk<http://www.fareham.gov.uk>

(+44)01329 824451





-----Original Message-----

From: TGregory@xxxxxxxxxxx.gov.uk<mailto:TGregory@xxxxxxxxxxx.gov.uk>
[mailto:TGregory@xxxxxxxxxxx.gov.uk]

Sent: 24 February 2012 09:55

To: UK Tree Care

Subject: Trees and vegetation near electricity lines



______________________________________________________________________

      SPRING 2012 TRAINING FROM QUANTIFIED TREE RISK ASSESSMENT LTD.

   QTRA Licensed User Training - 28 Feb Warwickshire, 13 March Surrey,

           17 April Chorley, 24 April Exeter, 1 May Cambridge.

QTRA Licensed User Update Training - 15 March Surrey, 19 April Chorley.

          A Practitioner's Guide to Visual Tree Risk Assessment

         29 Feb Warwickshire, 14 March Surrey, 18 April Chorley,

                     25 April Exeter, 2 May Cambridge.

______________________________________________________________________



Morning all,





I've been looking up the safe/required clearance from overhead
electricity lines and I can't find anything that actually states what
those distances are. I thought it was 1m from low voltage and 3m on high
voltage lines but this is just from what I've been told in the past and
I've never actually seen it written down anywhere. Does anyone know
where these specifications are written, either in legislation or
guidance from the National Grid?





Thanks in advance,





Thomas Gregory



Tree Officer







This email and any files transmitted with it are intended solely for the
addressed individual. The information in this email may be confidential;
if you have received it in error, please accept our apologies and notify
the sender as soon as possible, and delete it from your system without
distributing or copying any information contained within it. Under UK
Data Protection and Freedom of Information legislation, the contents of
this email might have to be disclosed in response to a request. We check
emails and attachments for viruses before they are sent, but you are
advised to carry out your own virus checks. Winchester City Council
cannot accept any responsibility for loss or damage caused by viruses.







--

The UK Tree Care mailing list

To unsubscribe send mailto:uktc-unsubscribe@xxxxxx.tree-care.info



If you believe that you have received this message in error, please
contact postmaster@xxxxxxxx.gov.uk<mailto:postmaster@xxxxxxxx.gov.uk> and
include a copy of this email.



Communications using this email system may be monitored.







--

The UK Tree Care mailing list

To unsubscribe send mailto:uktc-unsubscribe@xxxxxx.tree-care.info
************************************************************************
Disclaimer:

If you are not the intended recipient of this email (and any
attachment), please inform the sender by return email and destroy all
copies. Unauthorised access, use, disclosure, storage or copying is not
permitted.
The views expressed by the author do not necessarily reflect the views
or policies of Cheshire West and Chester Borough Council. The Council
cannot guarantee that this message or any attachment is virus free or
has not been intercepted and amended. You should perform your own virus
checks.
Cheshire West and Chester Borough Council may monitor emails and as a
public sector organisation; the Council may disclose this email (or any
response to it) under the Freedom of Information Act 2000.
Contracts cannot be concluded with the Council nor service effected by
email, unless otherwise expressly agreed. The contents of this e-mail
may be subject to privilege.
************************************************************************



-- 
The UK Tree Care mailing list
To unsubscribe send mailto:uktc-unsubscribe@xxxxxx.tree-care.info


This message has been scanned for viruses by BlackSpider MailControl -
www.blackspider.com




-- 
The UK Tree Care mailing list
To unsubscribe send mailto:uktc-unsubscribe@xxxxxx.tree-care.info

Current thread